Method of operating four-cycle explosive-engines.



i K B. ZINKE.. METHOD 0F OPERATING FUURQCYCLE EXPLOSIVEENGNES.

, K APPLICATION FILED JAN. 2l. 190]. 1,147,474.

f.. July 20, 19m..

2 SHEETS-SHEET ,1.

I Ill,1111/1111111lll/Ill(llIll/llI/lllll/llllllivil B. ZINKE.

METHOD 0F OPERATING FOUR-CYCLE EXPLOSVIVE ENGINS. APPLICAHO FILED JAN.21. 190?.

1,147,474; l vPaemed July 20, 1915.

onirica.

sanno amsn, or saannncxnn, GERMANY.

vTo all whomy it may concern? Be it known that l", BRUNOZINKE, a subf ject of the King of Prussia, residing at Saarl closed chambers.

briicken, in QGerInany," have invented certain new and useful Improvements 1n orRelating to Methods of Operating hour-Cycle y .xplosive-lvlachines, of which the following.

is a specification.

The methods of working gas engines are well known in which compressed air isused either Afor the formation of the mixture or for the scavenging of the residues of combustion from the cylinder, but in spite of the fact that persons highly skilled in the art agree as regards the value of the. scavenging, the scavenging has not been successfully accomplished because of the toogreat difficulties encountered in carrying it into practice.

-The attempt therefore to obtain special scavenging has been abandoned. It has been proposed to attain this object by providing the cylinder of a four-cycle gas engine with 'three chambers, two ot' which coinmunicate witha supply of air under. pressure while the third may be lilled with compressed gas. These chambers are cut 4oli' from the supply pipes at stated intervals andtheir contents allowed to expand into the cylinder through regulated valves, the

expansion of air from one of the'chainbers.

causing the flushing after :which the compressed mixture is admitted into the cylinder. This method of working, however, isl

open4 to objection in that the machine is complicated by the provision of the various valves and a separate air chamber for flushing the cylinder. Moreover, owing to the cutting oil ol the supply of gas and air to the chambers during the opening of the cylinder inlet valves, the charging of the cylinder .docs not take place under pressure which remains equal, but drops because of the expansion of the gas and air from the The present invention gives a practical method for expelling the residual products of combustion from gas engines of the four cycle type this being effected by air which enters the cylinder through the main inlet valve under approximately permanent pressure.

To obtain diagrams always uniform the lirst condition is, as is well known, that the gas and air should be as far as possible under the same pressure, and that the said Specication of Letters Patent.

Vinnemen. aan eo, rais.

Application filed January 21, 1907. Serial N0.-353,375.

pressures should practically remain the same relatively to each other. F or this rea.- son, the air in the airpipe is placed, accord ing to the present invention, 'permanently under pressure by means of' a separate air pump driveny in any convenient manner.

This pressure corresponds to that in thegas-pipe, and amounts to about. 100 centimeters water column above atmospheric pressure.

A constructional form of a founstroke engine for executing the method according to this invention is represented-in the accompanying drawing.

Figure Vl is a cross-section through the cylinder showing the gas and air admission devices; Fig. 2 a longitudinal 'section through the gas and the main inlet-valve; and, Fig. 3 a working diagram.

The gas is under pressure ina gas receptacle a provided underneath the engine and proceeds to the cylinder c through atube b. By means ot' a regulated valve l controlled by the regulator, the gas is admitted into4 the mixing space e and from .this by means of a regulated valve f into the cylinder, to-V gether with air. The air proceeds by means l ot' a blower g driven lloy the engine, through a conduit It into the mixingspace e and is kept continuously under pressure. The combustion gases are-discharged by means of a regulated valve 'i arranged in the lower part of the cylinder c.

The engine works in the following manner: The main inlet valve is opened in any known manner during the last part of the exhaust stroke. Air then enters thecylinder from the space e and scavenges or sweeps out the remaining residues ot' combustion througli the still-open outlet-valve i. Gn the closing of the outlet'valve at the end .of the exhaust stroke the gas inlet valve d is opened. The gas thereupon enters with the vair which is normally under pressure during the suction stroke, into the cylinder. rhe gas inlet valve d is only closed toward the end of this stroke and the inlet valve j" at the end ot' the stroke itself.

ln this manner the,

resence of an f residuar as in the inixin r lincorrectly composed and poor a higher compression in the case of a mix- `-ture spoiled by products of combustion.-

The gain ofwork shown by'the diagram is considerably `greater than the work used @or putting under pressure the whole quantity of air, as, owing to the arrangement of a .separate pump, the air is compressed only to the pressure really necessary.

This new process is especially suitable for small loads on the engine, in which case, as is well known the engine runs irregularly, is diticult to connect up in parallel and works with faulty ignitions. This is due to an mixture, as for small loads thedetrimental effect residues of combustion is greatest and, furthermore, the oscillations in the conduit for the gas and air are greatest.

Having thus fully described my invention, what l claimand desire to secure by Letters Patent is y l rl`he method herein described ofoperating four-cycle scavenging internal combustion engines consisting in separately of theV nieuwe gas under pressure to the intake7 separately supplying air to the intake under a practically constant predetermined pressure practically equal .withthe pressure pf the gas, separately admitting aironly from thev said air supply into the cylinder toward the end of the exhaust stroke to sweep out the residues of combustion through the opened outlet valve of 'the cylinder, closing the outlet valve of 'the cylinder immediately on the commencement of the charging stroke, admitting thereupon gas from the4 said gas supply into the cylinder, while the air continues to enter the cylinder with the proper amount of gas mixed therewith during the charging stroke, compressing the gas and air mixture during the compression stroke, expanding the explosion gases during the expansion stroke, and positively expelling the exhaust gases by the piston through the opened valve during the exhaust stroke.

gilln testimony whereof ll have signed my name to this specification in the presence of two subscribing Witnesses.

BRUN@ ZlNKE.

Witnesses y KARL FLUHRERE, WALTER HANSIN.

vsupplying 

